/*
 * Copyright (c) 2011, Marc-Andre Ferland - madrang@gmail.com
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the The Warrent Team nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *     * This software is free for non-commercial use. You may not use this
 *       software, in whole or in part, in support of any commercial product
 *       without the express consent of the author.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE WARRENT TEAM BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
using System;

using Cairo;
using Gdk;

namespace OsHelper.Notify
{
	public static class PixbufExt
	{
		/// <summary>
		/// Scale a pixbuf to the desired width or height maintaining the aspect ratio of the supplied pixbuf.
		/// Note that due to maintaining the aspect ratio, the returned pixbuf may not have the exact width AND height as is specified.
		/// Though it is guaranteed that one of these measurements will be correct.
		/// </summary>
		/// <param name="width">
		/// A <see cref="System.Int32"/>
		/// </param>
		/// <param name="height">
		/// A <see cref="System.Int32"/>
		/// </param>
		/// <param name="pixbuf">
		/// A <see cref="Pixbuf"/>
		/// </param>
		/// <returns>
		/// </returns>
		public static Pixbuf ARScale (this Pixbuf source, int width, int height)
		{
			double xScale = (double) width / (double) source.Width;
			double yScale = (double) height / (double) source.Height;
			double scale = Math.Min (xScale, yScale);
			
			if (scale == 1)
				return source;
			
			Pixbuf tmp = source.ScaleSimple ((int) (source.Width * scale),
											   (int) (source.Height * scale),
											   InterpType.Hyper);
			source.Dispose ();
			
			return tmp;
		}
	}

}

